Writing instrument



FIG. 1 is a front elevational view of a writing instrument showing my new design;

FIG. 2 is a top plan view;

FIG. 3 is a right side elevational view;

FIG. 4 is a left side elevational view;

FIG. 5 is a bottom plan view;

FIG. 6 is a perspective view;

FIG. 7 is a top plan view with the cap member removed for convenience of illustration;

FIG. 8 is a front elevational view of FIG. 7; and

FIG. 9 is a view similar to the FIG. 8 showing wherein an auxilliary nestable unit is disclosed therein by means of broken lines for illustrative purposes only. 

The ornamental design for a writing instrument, as shown and described. 